Machine for cornering box-blanks



4 Sheets-Sheet 1.

(No Model.) A. L. KINGSBURY.

MACHINE FOR CORNERING BQX BLANKS.' No. 530,780. Patented 1366.711;1894'.

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(No Model.) 4 sheets-'sheet 2.

A. L. KINGSBURY. MACHINE FOR GORNBRING BOX BLANKS.

No. 530,780. Patented Deo. l1, 1894.

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A. LJKINGSBURY.

MACHINE FOR G GRNBRING'BOX BLANKS. No. 530,780. Patented Dec.. 11,1894'.

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` Patented Dec. 1.1, 1894.

WMM/Leones @zw am@ i5 blanks, previously cut to size, the operation lends the said upper blades of the cutting l limitan STATES j PATENTOrmes.

ARTHUR L. KINGSBURY, OF N ORTHAMPTON, MASSACHUSETTS, ASSIGNOR OFTWO-THIRDS TO ADDTSON KINfGSBURY,. F SOUTH COVENTRY,.AND FRANK H. ALLEN,OF NORWICH, CONNECTICUT.

MACHIN E (FOR c o RNERi Nc sox-BLAN Ks.

S PECIFICAIIOAN formingjpart of Letters Patent No. 30,780,d1atedDecember 11, 1894.

g Applicata nealiprn 27,1894.

T0 all whom t may oon/cern: Be it known that I, ARTHUR L. KINGSBURY, acitizen of the United States, 'residing at Northampton, Hampshirecounty, "State v'of 5 Massachusetts, have invented certain new, anduseful Improvements in Machines for Cornerng Box-Blanks, whichimprovements are fully set forth and described in the followingspecification, reference being had Vto 1o the accompanying four sheetsof drawings.

The objectof this invention is to produce a machine the construction andmechanism of which shall be such that `the same,`under properconditions, shall perform upon boxl of corner-ing.

Box blanks of the class with which -my machine is especially adapted tooperate `are illustrated in FigureslO and 1l of the drawzo ings, whichdrawings are more fully 'described hereinafter.

In the manufacture of paper boxes, the blanks (usually of straw board)are first cutI to the required size and properly scm-ed,

z 5 after which they arecornered (being then in the condition inrwhichthey are illustrated in said figures) when they are ready to be brokenup and formed into boxes.

The style of blank-illustrated in Fig.

3o provides a box the bottom and sides ofwhich are composed of a` singlepiece y0f straw board and the ends of which are set on, while the styleof blank illustrated in Fig. ll is used in the construction Yof boxcovers 3 5 or very shallow boxes, the same being composed of a singlepiece of straw board, the corners being stayed by wire'clips or stripsof cloth or paper, as fully understood by those acquainted with the artof lbox making.

By reference to Figs. 10 and 1l it will beY noted that the corners inthe two styles of` blanks shown are differentlycut in each blank and itis the aim of this invention lto produce a machine which shall beadjustable to permit of its cutting both styles of corn-ers illustratedand which shall also vhave a sufficient range of adjustment toaccommodate blanks of all sizes ordinarily used and-which shall cut,within a certain range, any depth 5o of corners wished for. f

In the drawings, Fig. l is a side elevation ssriainmoazs. (Numan.)

of my machine. Fig. 21s an elevation of the back or rear side and Fig. 3a plan'vie'w of the same. Fig. 4 is Va vertical, central sectionalviewof the upper 'portion of my machine. Fig. `5 illustrates,principally in section, the meansprovided for 'adjusting horizontally(relative to each other) the corner cuttingknives'of my device. Fig. 6is a plan view of 'a vertically 'movable carriage byo 4 means of whichvertical reciprocating motion is imparted lto theupper blades of thecorner er cutting knives just referred to. Fig. 7 is a vertical,central, sectional view showing one of certain verticahrods andconnected parts, which rods support at Vtheir upper knives of `mydevice. Fig. 8 illustrates, in elevation, the several parts shown inFig. 7 but shows changed somewhat the positions oif'severa'l of saidparts. Fig. 9 is a plan View of an arm, two'of which are employed `toassist in supporting lthat end of the box blanks undergoing 4theoperation of corner cutting and in which is located the lower blade ofeach knife andshows in dotted lines the manner in'` which's'aid arms areadjustable to cause the cutting knives to properly Operate vwith dierentstyles of work. Figs. 10 and 1l areplan views of box blanks, properlyscored, and illustrate the different styles vof corner lcutting which itis possible to accomplish with my machine.

My machine, when properly assembled,` consists of a stand or table,preferably of con'- siderable weight, upon the top or bed plate of whichthe box blanks are placed and fed to the corner cutting mechanism, whichmechanism is located and supported adjacent to said bed plate. v

The reference letter A indicates the bed platejust referred to, whichbed plate is su pported'by two end frames lettered B andCrelspec-tively.Frames B and C are tied together attheir lower `portions by'cross framesD and E in which cross frames are provided bearin-gsfor the main shaft Fof 'my'devioe Shaft F has loosely located thereon a driving pulley G,driven bybelt G', saidvpulley beinglocked to lor released from shaft F,by means of a friction clutch H of any suitable style. Upon the end ofshaft F is ixedly secured an eccen- IOO tric J, which latter, throughits rod K, imparts motion to the corner cutting mechanism proper of mydevice, said eccentric being revolved by shaft F on which it is locatedas above explained, the shaft F being in turn revolved by pulley G whenlocked thereto by means of clutch H.

To shunt the clutch H on shaft F, to lock or release the same frompulley G, a lever M is centrally hinged as at N (midway the shaft andframe B) one end of which lever M is suitably connected to clutch H andthe other end of said lever is pivotally connected to the end of ahorizontal rod P, lying in bearings R, provided therefor in the lowerportion of the side frame B. Should rod P be slid outward in itsbearings, in the direction of the arrow in Fig. l, the end of lever Mpivoted thereto will likewise be carried outward and the same, swingingon its pivot N, will cause its oppositeend to swing inward, therebycarrying with it the clutch II and leaving the pulley G free to run idlyon shaft F. Should however rod P be slid in its bearings in thedirection opposite to that of the arrow in Fig. l, said lever M willalso be caused to rock in a direction opposite to that justdescribed,thereby locking the clutch and driving pulley and causing the latter torevolve on its shaft.

The following described mechanism'is provided whereby either hand orfoot power, as may be desired, may be employed to operate the clutch H.Beneath the main shaft F, at right` angles thereto, and supported inbearings in frames B and C is a rock-shaft S, to which is xedly securedafoot-lever T. Shaft S extends through its bearings in frame B and bearsupon its outer end an arm U the free end of which arm is slotted toreceive a stud P located on rod P. By reference to Fig. lit will be seenthat when the foot lever T is forced downward it rocks the shaft S, saidshaft, through its arm U, causing the rod P to slide in its ways in thedirection opposite to that of the arrow` in Fig. l and thus throw theclutch H into engagement with its pulley G, the various parts being thenin the positions illustrated in Fig. l. As soon as pressure is removedfrom foot-lever T a spiral spring S encircling shaft S (Fig 2 at oncecauses said shaft and its connected foot lever T and arm U to rock inthe opposite direction thus sliding rod P to release the clutch H frompulley G.

To operate clutch Il by hand a lever V is provided, hinged midway itslength to the frame B the lower end of which lever is pivotallyconnected to rod P and the free end of which lies conveniently near bedplate A.

It will be seen by reference to Fig. 1 that, when the free end of leverV is forced into the position shown in said iigure, the rod R will havebeen caused to so slide in its bearings as to lockthe clutch H andpulley G and it will be as readily understood that, should said lever bedrawn outward the clutch H will,

through rod P and lever M, be released from its pulley G. A suitableratchet catch `W is provided on frame B to prevent the leverV, afterhaving been forced backward, from being rocked, by the force of springS. g

I have provided my machine with two methods for operating the clutchmechanism, as illustrated and described, but it will be seen that onlyone method is absolutely necessary.

When my machine is properly assembled and in operation the cuttingknives proper of my device have a certain vertical reciprocating motionwhich motion is imparted thereto by means of eccentric J through its rodK, but I do not wish to be understood as conning myself to thisparticular manner of obtaining that motion, nor to the particularconstruction illustrated aud described of the table and its supportingframes, nor to the manner in which the several elements of the mechanismabove described, consisting of main shaft, driving pulley and clutch andeccentric and connected parts, and the manner of controlling said clutchmechanism are assembled, said mechanism being simply illustrated anddescribed as being a very desirable means for producing suchreciprocating motion, and the manner which I preferably employ, but itis evident that other styles of stands or tables could be constructedand other means employed for producing the desired vertical movementwith equally good results. y

Having now described the general construe` tion of the stand or table ofmy machine, the means provided for imparting motion to the cornercutting `mechanism above referred to and the means employed forcontrolling the driving mechanism, I will proceed to describe the cornercutting mechanism proper, which latter forms the essential feature of myuinvention.

Secured to the frames B--C at the rear side of my machine (the righthand as shown in Fig. 1) and about midway the height of the side frames,`are "V shaped vertical Ways a, in which is arranged to travel acarriage l) said carriage being pivotally connected midway its length,on its under side, to the upper end of eccentric rod K by which rod saidcarriage is actuated, the preferred shape of said ways and theirrelation relative to each other and the manner in which said carriage iscaused to travel in its ways by motion imparted thereto from eccentricG, through its rod K, being clearly shown in Figs. l, 2, 4 and 6.

Carried by carriage b are two vertical rods c to the upperends of whichare secured arms h which carry the upper cutting blades of the knives ofmy device, as hereinafter fully de scribed. The lower ends of rods careformed with enlarged heads c which, when my device is properlyassembled, lie in an undercut groove b extending throughout the lengthof carriage b, said disks c being capable of longitudinal adjustmentrelative to each other in said groove b.

IOO

IIO

' esoy/so l e Supported by frames B-C, somewhat above ways d andreaching entirely across the back side of my machine is a cross-frame d.The edges of frame d provide a horizontal track which supports twovertical shells or collars e, the same being supported by arms e locatedon said shells, which arms so engage track d as to support shells ethereon but still allow said shells to be moved freely toward or awayfrom each other on track d, fora purpose hereinafter explained. Thislongitudinal movement of shells e is accomplished in the followingmannerz-Each shell e is provided between its arms e with a projection e2whichV projections, when the shells are in position onl the track, liein a channel or undercut groove CZ extending throughout the length ofcross frame d. Lying within this groove CZ. and passing through eachprojection e2 is a rod f formed with right and left hand threads, which,when assembled, are in engagement respectively with the threadedprojections e2 of sleeves e. Rod f is preferably provided with a handwheel f whereby it may be conveniently rotated and longitudinaldisplacement of said rod is prevented by 'means of a stud or pin d2which engages the same near its central portion as shown in Fig. 2.

rlhe construction, location and the relative positions of the describedtrack, sleeves, threaded rod and connected parts are clearly shown inFigs. 1, 2, 3, 4, 5, 7 and 8 and by spe-v cial reference to Figs. 2 and5 it will be clearly understood that rotation of the threaded rod willcause the sleeves c to travel on track d either toward or away from eachother in accordance with the direction of rotation of said rod.

Supported within shells e are what might be termed cylindrical guides gin which, when my machine is properly assembled and in operation, therods c, already referred to slide. Guides g are prevented from slippingdown through sleeves e by radial arms g` located at their upperportions, and it will be seen by reference to Figs. l and 3 that theupper face of each of said arms is flush with the top of the bed plate Aof my machine.

I have already referred to certain arms (indicated by the letter h)supported on the upper ends of rods c, which arms bear upon their outerfree ends the upper cutting'knives 7c of my machine, the shape of whichis most clearly shown in Fig. 9. Openings g2 are provided in arms g toreceive the upper cutting knives, aportion of the side wall of eachopening being so constructed as to coact with each knife 7c to produce ashearing out.

The rods c are preferably square and the hole through guides g in whichthey slide is correspondingly shaped. With a guide and rod thusconstructed it will be seen that the arms g and h will always beretained in the same vertical plane relative to each other.

In order that my machine may be successfully operated upon the twostyles kof blanks illustrated in Figs. 10 and 1l itis necessary that acertain adjustment of guides g within sleeves e be provided in' orderthatthe arms g and'h may be deflected from the position shown in fulllines in the drawings to that shown indotted lines, or Vice versa. Tomake these adjustments guides g are rotated within sleeves e and whenthe desired position of the former is attained a suitable lock as a setscrew e3, is provided in each sleeve adapted to enter holes g3 properlylocated in the guides g to receive the same, as most clearly shown inFigs. 5 and 7, from which'igures it will be seen that when the screws e2are in place in guides g the latter are positively held against rotationin their respective sleeves.A

Assuming that the various parts of my machine thus far described areproperly assembled it will be seen, first, that when the machine is inoperation, carriage b is given a vertical reciprocating motion and thatsuch motion Will be communicated through rods c sliding in guides g tothe upper blades of the cutting knives; second, that through thethreaded rod f actuating sleeves e, said sleeves and parts connectedthereto may be caused to travel toward or away from each other, as thecase may be, the disks c of rods c correspondingly traveling lin grooveb of carriage b, and thirdly, by the manner in which the guides g androds c are assembled within sleeves e the arms g and h of each pair maybe swung in unison from a common center. The upper knife consists of twodistinct cutting edges, located at right angles to each other as shownin the drawings and the lower blade is correspondingly shaped to coacttherewith. Should arms g and h bearing said knives, be adjusted to theposition shown in full lines in the drawings and should a box blank ofthe class shown in Fig. 10 be placed between the same (said box blankbeing fed thereto in the direction of the arrow of Fig. 9) it will beseen that, when the knife k descends, corners m, of the shape shown insaid Fig. 10, will be cut in the said blank. Should however the knivesbe adjusted as shown in dotted lines in Figs. 3 and l9 and a blank ofthe class shown in Fig. 1l

fed thereto, in the same manner as just described, it will be seen thatthe knife le, upon descending, will cut out corners m of the class shownin said Fig. 11, the difference in the corners in said Figs. 10 and llbeing readily-seen by reference tothe figures.

In the operation of corner cutting, several blanks properly piled up arefed forward to the knives and, to support that portion of said blanksbetween the knives, the bed-plate A is provided with a centralprojection Aon its rear side. A stop n is provided on said projectionagainst which the blanks, being operated upon, abut, said stop beingadjustable to regulate the depth of corners to be cut in the blanks.Stop n travels in a slot A2 the lower portion of said stop extendingdown through the slot. Said stop is operated by means of a rod osupported in bearings IOO IIO

Y beneath the plate A and provided at one end with a hand wheel o bywhich it may be easily rotated and at its opposite end with a screwthread which engages the lower portion of stop n.

Then it is desired to use the machine the stop it is so adjusted as toallow the blanks to be introduced between the blades of the knives thenecessary distance to produce the desired depth of cut. A scale, asshown in Fig. 3, may be provided near the slot A2, whereby the properadjustment of stop n to produce a desired depth of cut may be readilydetermined.

To avoid the trouble of nding on each blank, or pile of blanksintroduced into the machine, the exact places at which the cornercutting shall be done I provide guides or ways 19 on the bed plate Abetween which the blanks are accurately introduced to the knives. Theseways are of the form shown in Figs. l, 2, 3 and 4t and are adjustablysecured to the table top by means of set screws t lying in slots t.

'When in use the guides are secured to the bed plate a distance apartequal to the length of blank to be operated upon and in such location onthe said bed plate that those points on the blank at which the cornersare to be cut, will be directly in alignment with the corner cuttingknives so that when fed forward the blanks will at once find theirproper places between said knives.

The ends of the guides p near the front ot the machine are preferablyturned outward as shown whereby the blanks may be readily fed betweenthe same.

Assuming` now that we have a complete machine constructed as described,the various parts properly assembled and adjusted relatively to eachother (the knives `being set to eut the required style of corner) andthat it is desired Vto operate the machine, the same is first set inmotion in the manner already described. Several blanks properly piledup, are fed forward on the bed plate A between the guides p toward theknives, until the blanks abut the stop n which has previously beenadjusted to obtain the required depth of cut. Then the blades 7o intheir downward motion come in contact with the blanks they at oncecorner the same, when the blanks are removed and the reverse edge of thepile of blanks similarly introduced to the knives to be cornered Mymachine asa whole is not expensive to produce, is of simple constructionand performs rapidly, and in an excellent manner, the operation ofcornering this class of blanks.

Having described my invention, I claiml. In combination with a worksupporting table, a reciprocatory support mounted thereon, a cutter uponthe support located eccentrically to and movable parallel with the axisof the support, said cutter being movable relatively to the materialupon table, with the support as a center of said movement, and means forreciprocating the support and cutter, substantially as set forth.

2. In combination with a work supporting table, a shell or collarsecured thereto, a longitudinally movable rotary support within theshell, a cutter secured to the support eccentric to the axis thereof,and means for moving the support, substantially as set forth.

3. In combination with a work supporting table, a support thereon, aguide upon the support, an arm upon the support and an arm upon theguide, a cutter upon the arm of the support, and the arm of the guidebeing provided with an opening, and means for moving the support and forrotating it and the guide, substantially as set forth.

4. In combination with a Work supporting table, a sleeve carried therebya guide in said sleeve provided with an angular longitudinalperforation, an angular support through the guide, the upper end ofwhich is provided with a cutter located eccentrically to the axis of thesupport, a set screw through the sleeve, the inner end of which isadapted to engage with the guide, and to lock it against rotation, and`meansfor reciprocating the support, substantially as set forth.

5. In combination with a work supporting table, provided With a crossarm, a pair of reciprocatorysu pports carried bysaid cross arm the upperend of each of which supports is provided with a cutter locatedeccentrically to the axis of the support, and means for simultaneouslymoving said supports toward each other and for rotating them upon theiraxes, substantially as set forth.

6. In combination with a work supporting table provided with an undercut cross bar, of a pairof sleeves upon said bar, each sleeve beingprovided with a perforated projection which fits within the under cutportion of the bar, an oppositely screw threaded rod through theperforations of the projections, a guide in each sleeve, an arm upon theupper end of the guide provided with a hole, a longitudinally movablerotary support within each guide, the upper end of which is providedwith a cutter located eccentrically to the axis thereof, and means forsimultaneously reciprocating said supports, substantially as set forth.

7. In combination with a work supporting table provided with a crossbar, a pair of 1ongitudinally movable reciprocatory supports carried bysaid bar, the lower end of each of which is provided with a head, acutter secured to the upper end of each support, a grooved carriagebelow the cross bar, the ends of the supports fitting within the groovedportion of the carriage, and means for moving the carriage,substantially as set forth.

ARTHUR L. KINGSBURY.

Witnesses:

H. P. FIELD, A. J. ALDRICH.

IZO

